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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 19 — Oct. 1, 2013
  • pp: 3799–3802

Multiplexed detection of xylene and trichloroethylene in water by photonic crystal absorption spectroscopy

Wei-Cheng Lai, Swapnajit Chakravarty, Yi Zou, and Ray T. Chen  »View Author Affiliations

Optics Letters, Vol. 38, Issue 19, pp. 3799-3802 (2013)

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We experimentally demonstrate simultaneous selective detection of xylene and trichloroethylene (TCE) using multiplexed photonic crystal waveguides (PCWs) by near-infrared optical absorption spectroscopy on a chip. Based on the slow light effect of photonic crystal structure, the sensitivity of our device is enhanced to 1 ppb (v/v) for xylene and 10 ppb (v/v) for TCE in water. Multiplexing is enabled by multimode interference power splitters and Y-combiners that integrate multiple PCWs on a silicon chip in a silicon-on-insulator platform.

© 2013 Optical Society of America

OCIS Codes
(130.6010) Integrated optics : Sensors
(130.5296) Integrated optics : Photonic crystal waveguides
(230.5298) Optical devices : Photonic crystals

ToC Category:
Integrated Optics

Original Manuscript: July 18, 2013
Revised Manuscript: August 15, 2013
Manuscript Accepted: August 27, 2013
Published: September 20, 2013

Wei-Cheng Lai, Swapnajit Chakravarty, Yi Zou, and Ray T. Chen, "Multiplexed detection of xylene and trichloroethylene in water by photonic crystal absorption spectroscopy," Opt. Lett. 38, 3799-3802 (2013)

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